Added server option "useCdn", use template statement to route resources' source

lib/response.js

@@ -34,6 +34,7 @@ var response = {
     showFeatures: showFeatures,
     showNote: showNote,
     showPublishNote: showPublishNote,
+	showIndex: showIndex,
     noteActions: noteActions,
     publishNoteActions: publishNoteActions
 };
@@ -55,6 +56,18 @@ function responseError(res, code, detail, msg) {
     res.end();
 }
 
+function showIndex(req, res, next) {
+    res.writeHead(200, {
+        'Content-Type': 'text/html'
+    });
+    var template = config.indexpath;
+    var content = ejs.render(fs.readFileSync(template, 'utf8'), {
+        useCDN: config.usecdn
+    });
+    res.write(content);
+    res.end();
+}
+
 function responseHackMD(res, noteId) {
     if (noteId != config.featuresnotename) {
         if (!Note.checkNoteIdValid(noteId)) {